On Mon, 9 Dec 2013, H.J. Lu wrote: > Normally, a PIE executable has zero virtual address on the first PT_LOAD > segment and kernel will load such executable at random address when > randomization is enabled. If randomization is disabled, kernel will load > it at a fixed address. But if a PIE executable has non-zero virtual > address on the first PT_LOAD segment, kernel will load such executable > at the non-zero virtual address when randomization is enabled. But when > randomization is disabled, kernel ignores the non-zero virtual address > at the non-zero virtual address when randomization is enabled.
Hmm ... isn't actually this the thing that needs to be fixed instead? IOW, when randomization is enabled, is there a reason not to load on randomized address? (even if the first PT_LOAD segment has non-zero vaddr?) > But when randomization is disabled, kernel ignores the non-zero virtual > address on the first PT_LOAD segment and loads it at the fixed address. > This patch makes kernel consistent by loading PIE executable with > non-zero virtual address at the non-zero virtual address, regardless if > randomization is enabled or disabled. -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
